Pad Switching; Port Type Definition - Nortel Meridian 1 Succession 1000 Manual

Page 110 of 236

Pad switching

Port type definition

553-3001-182 Standard 1.00
Digital Trunk and Primary Rate Interface
assignment of different pad values to different trunk types and customers.
With the exception of the UK and Germany, most of Europe uses 0 dB pads
on all digital trunks and connections.
For 2.0 Mbit DTI/PRI, switching of the loss value is on the receive and
transmit side, depending on the port type involved in the connection.
A trunk connected to a 2.0 Mbit DTI/PRI trunk has its pad state set by the pad
switching algorithm for that trunk type. If the connection is a 1.5 Mbit DTI/
PRI trunk to a 2.0 Mbit DTI/PRI trunk, then the 1.5 Mbit DTI pad switching
algorithm sets the 1.5 Mbit DTI/PRI trunk pad states. If the connection is an
analog trunk to a 2.0 Mbit DTI/PRI trunk, then the pad switching method for
that trunk type sets the analog trunk pad states.
XDID, XFCOT, and XFEM trunks have their pad state set to pad out (Base
level).
XUT and XEM trunks set their pad states to pad out. Chinese packs use the
values in the base table.
The following criteria identify the port types involved in a connection:
• unit type
• Class of Service (CLS)
• Port type (PTYP) designation in LD 16
• Trunk Signaling
• XTRK type
R2 Multi-Frequency Compelled signaling capability is available on switches
with DTI 1.5 TIE or DID trunks, and is configured as MFC Class of Service
in LD 14. This capability does not support the Alternate Loss Plan.
October 2003